﻿using System;
using System . Collections . Generic;
using System . IO;
using System . Linq;
using System . Runtime . InteropServices . WindowsRuntime;
using Windows . ApplicationModel;
using Windows . ApplicationModel . Activation;
using Windows . Foundation;
using Windows . Foundation . Collections;
using Windows . UI . Xaml;
using Windows . UI . Xaml . Controls;
using Windows . UI . Xaml . Controls . Primitives;
using Windows . UI . Xaml . Data;
using Windows . UI . Xaml . Input;
using Windows . UI . Xaml . Media;
using Windows . UI . Xaml . Media . Animation;
using Windows . UI . Xaml . Navigation;
using Windows . Media . Capture;
using System . Threading . Tasks;
using Windows . Storage;
using Windows . Media . MediaProperties;


// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227

namespace WenceyWang . RichMan4L . App
{
    /// <summary>
    /// Provides application-specific behavior to supplement the default Application class.
    /// </summary>
    public sealed partial class App : Application
    {
#if WINDOWS_PHONE_APP
        private TransitionCollection transitions;
#endif

        /// <summary>
        /// Initializes the singleton application object.  This is the first line of authored code
        /// executed, and as such is the logical equivalent of main() or WinMain().
        /// </summary>
        public App ( )
        {
            this . InitializeComponent ( );
            this . Suspending += this . OnSuspending;
        }

        /// <summary>
        /// Invoked when the application is launched normally by the end user.  Other entry points
        /// will be used when the application is launched to open a specific file, to display
        /// search results, and so forth.
        /// </summary>
        /// <param name="e">Details about the launch request and process.</param>
        protected override void OnLaunched ( LaunchActivatedEventArgs e )
        {
#if DEBUG
            if ( System . Diagnostics . Debugger . IsAttached )
            {
                this . DebugSettings . EnableFrameRateCounter = true;
            }
#endif

            Frame rootFrame = Window . Current . Content as Frame;

            // Do not repeat app initialization when the Window already has content,
            // just ensure that the window is active
            if ( rootFrame == null )
            {
                // Create a Frame to act as the navigation context and navigate to the first page
                rootFrame = new Frame ( );

                // TODO: change this value to a cache size that is appropriate for your application
                rootFrame . CacheSize = 1;

                if ( e . PreviousExecutionState == ApplicationExecutionState . Terminated )
                {
                    // TODO: Load state from previously suspended application
                }

                // Place the frame in the current Window
                Window . Current . Content = rootFrame;
            }

            if ( rootFrame . Content == null )
            {
#if WINDOWS_PHONE_APP
                // Removes the turnstile navigation for startup.
                if ( rootFrame . ContentTransitions != null )
                {
                    this . transitions = new TransitionCollection ( );
                    foreach ( var c in rootFrame . ContentTransitions )
                    {
                        this . transitions . Add ( c );
                    }
                }

                rootFrame . ContentTransitions = null;
                rootFrame . Navigated += this . RootFrame_FirstNavigated;
#endif
                //#if WINDOWS_PHONE_APP
                rootFrame . Navigate ( typeof ( Pages . StartPage ) , e . Arguments , new NullNavigationTransitionInfo ( ) );
                //#endif
                // When the navigation stack isn't restored navigate to the first page,
                // configuring the new page by passing required information as a navigation
                // parameter
                //if ( !rootFrame.Navigate(typeof(MainPage), e.Arguments))
                //{
                //    throw new Exception("Failed to create initial page");
                //}
            }

            // Ensure the current window is active
            Window . Current . Activate ( );


        }

#if WINDOWS_PHONE_APP
        /// <summary>
        /// Restores the content transitions after the app has launched.
        /// </summary>
        /// <param name="sender">The object where the handler is attached.</param>
        /// <param name="e">Details about the navigation event.</param>
        private void RootFrame_FirstNavigated ( object sender , NavigationEventArgs e )
        {
            var rootFrame = sender as Frame;
            rootFrame . ContentTransitions = this . transitions ?? new TransitionCollection ( ) { new NavigationThemeTransition ( ) };
            rootFrame . Navigated -= this . RootFrame_FirstNavigated;
        }
#endif

        /// <summary>
        /// Invoked when application execution is being suspended.  Application state is saved
        /// without knowing whether the application will be terminated or resumed with the contents
        /// of memory still intact.
        /// </summary>
        /// <param name="sender">The source of the suspend request.</param>
        /// <param name="e">Details about the suspend request.</param>
        private void OnSuspending ( object sender , SuspendingEventArgs e )
        {
            var deferral = e . SuspendingOperation . GetDeferral ( );
#if WINDOWS_PHONE_APP && RecordVideo
            CleanupCaptureAsync ( );
#endif
            // TODO: Save application state and stop any background activity
            deferral . Complete ( );
        }

#if WINDOWS_PHONE_APP && RecordVideo
        /// <summary>
        /// 引用正在使用的MediaCapture对象
        /// </summary>
        public static MediaCapture CurrentCapture { get; set; }
        /// <summary>
        /// 标识是否处于录制状态
        /// </summary>
        public static bool IsRecording { get; set; }
#endif

#if WINDOWS_PHONE_APP && RecordVideo
        /// <summary>
        /// 清理MediaCapture组件
        /// </summary>
        public static async void CleanupCaptureAsync ( )
        {
            if ( CurrentCapture != null )
            {
                if ( IsRecording )
                {
                    await CurrentCapture . StopRecordAsync ( );
                    IsRecording = false;
                }
                CurrentCapture . Dispose ( );
                CurrentCapture = null;
            }
        }

        /// <summary>
        /// 初始化Capture组件
        /// </summary>
        public static void InitailizeCapureAsync ( )
        {
            CurrentCapture = new MediaCapture ( );
            ScreenCapture screenCap = ScreenCapture.GetForCurrentView();

            MediaCaptureInitializationSettings settings = new MediaCaptureInitializationSettings();
            // 设置源
            //settings.AudioSource = screenCap.AudioSource;
            settings . VideoSource = screenCap . VideoSource;
            // 只捕捉视频
            settings . StreamingCaptureMode = StreamingCaptureMode . Video;
            CurrentCapture . InitializeAsync ( settings ) . GetResults ( );
        }
#endif

    }
}